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/* Copyright (C) 2005, 2007, 2008, 2013 by George Williams */
/*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/* modified by Werner Lemberg <wl@gnu.org> */
/* This file is now part of the FreeType library */
#define _XOPEN_SOURCE 600 /* for `kill', `strdup', `random', and `srandom' */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <unistd.h>
#include <dirent.h>
#include <signal.h>
#include <time.h>
#include <ft2build.h>
#include <freetype/freetype.h>
#include <freetype/ftoutln.h>
#define true 1
#define false 0
#define forever for (;;)
static int check_outlines = false;
static int nohints = false;
static int rasterize = false;
static char* results_dir = "results";
#define GOOD_FONTS_DIR "/usr/local/share/fonts"
static char* default_dir_list[] =
{
GOOD_FONTS_DIR,
NULL
};
static char* default_ext_list[] =
{
"ttf",
"otf",
"ttc",
"cid",
"pfb",
"pfa",
"bdf",
"pcf",
"pfr",
"fon",
"otb",
"cff",
NULL
};
static unsigned int error_count = 1;
static double error_fraction = 0.0;
static FT_F26Dot6 font_size = 12 * 64;
static struct fontlist
{
char* name;
long len;
unsigned int isbinary: 1;
unsigned int isascii: 1;
unsigned int ishex: 1;
} *fontlist;
static unsigned int fcnt;
static int
FT_MoveTo( const FT_Vector *to,
void *user )
{
FT_UNUSED( to );
FT_UNUSED( user );
return 0;
}
static int
FT_LineTo( const FT_Vector *to,
void *user )
{
FT_UNUSED( to );
FT_UNUSED( user );
return 0;
}
static int
FT_ConicTo( const FT_Vector *_cp,
const FT_Vector *to,
void *user )
{
FT_UNUSED( _cp );
FT_UNUSED( to );
FT_UNUSED( user );
return 0;
}
static int
FT_CubicTo( const FT_Vector *cp1,
const FT_Vector *cp2,
const FT_Vector *to,
void *user )
{
FT_UNUSED( cp1 );
FT_UNUSED( cp2 );
FT_UNUSED( to );
FT_UNUSED( user );
return 0;
}
static FT_Outline_Funcs outlinefuncs =
{
FT_MoveTo,
FT_LineTo,
FT_ConicTo,
FT_CubicTo,
0, 0 /* No shift, no delta */
};
static void
TestFace( FT_Face face )
{
unsigned int gid;
int load_flags = FT_LOAD_DEFAULT;
if ( check_outlines &&
FT_IS_SCALABLE( face ) )
load_flags = FT_LOAD_NO_BITMAP;
if ( nohints )
load_flags |= FT_LOAD_NO_HINTING;
FT_Set_Char_Size( face, 0, font_size, 72, 72 );
for ( gid = 0; gid < face->num_glyphs; gid++ )
{
if ( check_outlines &&
FT_IS_SCALABLE( face ) )
{
if ( !FT_Load_Glyph( face, gid, load_flags ) )
FT_Outline_Decompose( &face->glyph->outline, &outlinefuncs, NULL );
}
else
FT_Load_Glyph( face, gid, load_flags );
if ( rasterize )
FT_Render_Glyph( face->glyph, ft_render_mode_normal );
}
FT_Done_Face( face );
}
static void
ExecuteTest( char* testfont )
{
FT_Library context;
FT_Face face;
if ( FT_Init_FreeType( &context ) )
{
fprintf( stderr, "Can't initialize FreeType.\n" );
exit( 1 );
}
if ( FT_New_Face( context, testfont, 0, &face ) )
{
/* The font is erroneous, so if this fails that's ok. */
exit( 0 );
}
if ( face->num_faces == 1 )
TestFace( face );
else
{
long i, num;
num = face->num_faces;
FT_Done_Face( face );
for ( i = 0; i < num; i++ )
{
if ( !FT_New_Face( context, testfont, i, &face ) )
TestFace( face );
}
}
FT_Done_FreeType( context );
exit( 0 );
}
static int
extmatch( char* filename,
char** extensions )
{
int i;
char* pt;
if ( !extensions )
return true;
pt = strrchr( filename, '.' );
if ( !pt )
return false;
if ( pt < strrchr( filename, '/' ) )
return false;
for ( i = 0; extensions[i] != NULL; i++ )
if ( strcasecmp( pt + 1, extensions[i] ) == 0 ||
strcasecmp( pt, extensions[i] ) == 0 )
return true;
return false;
}
static void
figurefiletype( struct fontlist* item )
{
FILE* foo;
item->isbinary = item->isascii = item->ishex = false;
foo = fopen( item->name, "rb" );
if ( foo )
{
/* Try to guess the file type from the first few characters... */
int ch1 = getc( foo );
int ch2 = getc( foo );
int ch3 = getc( foo );
int ch4 = getc( foo );
fclose( foo );
if ( ( ch1 == 0 && ch2 == 1 && ch3 == 0 && ch4 == 0 ) ||
( ch1 == 'O' && ch2 == 'T' && ch3 == 'T' && ch4 == 'O' ) ||
( ch1 == 't' && ch2 == 'r' && ch3 == 'u' && ch4 == 'e' ) ||
( ch1 == 't' && ch2 == 't' && ch3 == 'c' && ch4 == 'f' ) )
{
/* ttf, otf, ttc files */
item->isbinary = true;
}
else if ( ch1 == 0x80 && ch2 == '\01' )
{
/* PFB header */
item->isbinary = true;
}
else if ( ch1 == '%' && ch2 == '!' )
{
/* Random PostScript */
if ( strstr( item->name, ".pfa" ) ||
strstr( item->name, ".PFA" ) )
item->ishex = true;
else
item->isascii = true;
}
else if ( ch1 == 1 && ch2 == 0 && ch3 == 4 )
{
/* Bare CFF */
item->isbinary = true;
}
else if ( ch1 == 'S' && ch2 == 'T' && ch3 == 'A' && ch4 == 'R' )
{
/* BDF */
item->ishex = true;
}
else if ( ch1 == 'P' && ch2 == 'F' && ch3 == 'R' && ch4 == '0' )
{
/* PFR */
item->isbinary = true;
}
else if ( ( ch1 == '\1' && ch2 == 'f' && ch3 == 'c' && ch4 == 'p' ) ||
( ch1 == 'M' && ch2 == 'Z' ) )
{
/* Windows FON */
item->isbinary = true;
}
else
{
fprintf( stderr,
"Can't recognize file type of `%s', assuming binary\n",
item->name );
item->isbinary = true;
}
}
else
{
fprintf( stderr, "Can't open `%s' for typing the file.\n",
item->name );
item->isbinary = true;
}
}
static void
FindFonts( char** fontdirs,
char** extensions )
{
int i;
unsigned int max;
char buffer[1025];
struct stat statb;
max = 0;
fcnt = 0;
for ( i = 0; fontdirs[i] != NULL; i++ )
{
DIR* examples;
struct dirent* ent;
examples = opendir( fontdirs[i] );
if ( !examples )
{
fprintf( stderr,
"Can't open example font directory `%s'\n",
fontdirs[i] );
exit( 1 );
}
while ( ( ent = readdir( examples ) ) != NULL )
{
snprintf( buffer, sizeof ( buffer ),
"%s/%s", fontdirs[i], ent->d_name );
if ( stat( buffer, &statb ) == -1 || S_ISDIR( statb.st_mode ) )
continue;
if ( !extensions || extmatch( buffer, extensions ) )
{
if ( fcnt >= max )
{
max += 100;
fontlist = realloc( fontlist, max * sizeof ( struct fontlist ) );
if ( !fontlist )
{
fprintf( stderr, "Can't allocate memory\n" );
exit( 1 );
}
}
fontlist[fcnt].name = strdup( buffer );
fontlist[fcnt].len = statb.st_size;
figurefiletype( &fontlist[fcnt] );
fcnt++;
}
}
closedir( examples );
}
if ( fcnt == 0 )
{
fprintf( stderr, "Can't find matching font files.\n" );
exit( 1 );
}
fontlist[fcnt].name = NULL;
}
static unsigned int
getErrorCnt( struct fontlist* item )
{
if ( error_count == 0 && error_fraction == 0.0 )
return 0;
return error_count + (unsigned int)( error_fraction * item->len );
}
static int
getRandom( int low,
int high )
{
if ( low - high < 0x10000L )
return low + ( ( random() >> 8 ) % ( high + 1 - low ) );
return low + ( random() % ( high + 1 - low ) );
}
static int
copyfont( struct fontlist* item,
char* newfont )
{
static char buffer[8096];
FILE *good, *newf;
size_t len;
unsigned int i, err_cnt;
good = fopen( item->name, "r" );
if ( !good )
{
fprintf( stderr, "Can't open `%s'\n", item->name );
return false;
}
newf = fopen( newfont, "w+" );
if ( !newf )
{
fprintf( stderr, "Can't create temporary output file `%s'\n",
newfont );
exit( 1 );
}
while ( ( len = fread( buffer, 1, sizeof ( buffer ), good ) ) > 0 )
fwrite( buffer, 1, len, newf );
fclose( good );
err_cnt = getErrorCnt( item );
for ( i = 0; i < err_cnt; i++ )
{
fseek( newf, getRandom( 0, (int)( item->len - 1 ) ), SEEK_SET );
if ( item->isbinary )
putc( getRandom( 0, 0xFF ), newf );
else if ( item->isascii )
putc( getRandom( 0x20, 0x7E ), newf );
else
{
int hex = getRandom( 0, 15 );
if ( hex < 10 )
hex += '0';
else
hex += 'A' - 10;
putc( hex, newf );
}
}
if ( ferror( newf ) )
{
fclose( newf );
unlink( newfont );
return false;
}
fclose( newf );
return true;
}
static int child_pid;
static void
abort_test( int sig )
{
FT_UNUSED( sig );
/* If a time-out happens, then kill the child */
kill( child_pid, SIGFPE );
write( 2, "Timeout... ", 11 );
}
static void
do_test( void )
{
int i = getRandom( 0, (int)( fcnt - 1 ) );
static int test_num = 0;
char buffer[1024];
snprintf( buffer, 1024, "%s/test%d", results_dir, test_num++ );
if ( copyfont ( &fontlist[i], buffer ) )
{
signal( SIGALRM, abort_test );
/* Anything that takes more than 20 seconds */
/* to parse and/or rasterize is an error. */
alarm( 20 );
if ( ( child_pid = fork() ) == 0 )
ExecuteTest( buffer );
else if ( child_pid != -1 )
{
int status;
waitpid( child_pid, &status, 0 );
alarm( 0 );
if ( WIFSIGNALED ( status ) )
printf( "Error found in file `%s'\n", buffer );
else
unlink( buffer );
}
else
{
fprintf( stderr, "Can't fork test case.\n" );
exit( 1 );
}
alarm( 0 );
}
}
static void
usage( FILE* out,
char* name )
{
char** d = default_dir_list;
char** e = default_ext_list;
fprintf( out, "%s [options] -- Generate random erroneous fonts\n"
" and attempt to parse them with FreeType.\n\n", name );
fprintf( out, " --all All non-directory files are assumed to be fonts.\n" );
fprintf( out, " --check-outlines Make sure we can parse the outlines of each glyph.\n" );
fprintf( out, " --dir <path> Append <path> to list of font search directories\n"
" (no recursive search).\n" );
fprintf( out, " --error-count <cnt> Introduce <cnt> single byte errors into each font\n"
" (default: 1)\n" );
fprintf( out, " --error-fraction <frac> Introduce <frac>*filesize single byte errors\n"
" into each font (default: 0.0).\n" );
fprintf( out, " --ext <ext> Add <ext> to list of extensions indicating fonts.\n" );
fprintf( out, " --help Print this.\n" );
fprintf( out, " --nohints Turn off hinting.\n" );
fprintf( out, " --rasterize Attempt to rasterize each glyph.\n" );
fprintf( out, " --results <path> Place the created test fonts into <path>\n"
" (default: `results')\n" );
fprintf( out, " --size <float> Use the given font size for the tests.\n" );
fprintf( out, " --test <file> Run a single test on an already existing file.\n" );
fprintf( out, "\n" );
fprintf( out, "Default font extensions:\n" );
fprintf( out, " " );
while ( *e )
fprintf( out, " .%s", *e++ );
fprintf( out, "\n" );
fprintf( out, "Default font directories:\n" );
fprintf( out, " " );
while ( *d )
fprintf( out, " %s", *d++ );
fprintf( out, "\n" );
}
int
main( int argc,
char** argv )
{
char **dirs, **exts;
int dcnt = 0, ecnt = 0, rset = false, allexts = false;
int i;
time_t now;
char* testfile = NULL;
dirs = calloc( (size_t)( argc + 1 ), sizeof ( char ** ) );
exts = calloc( (size_t)( argc + 1 ), sizeof ( char ** ) );
for ( i = 1; i < argc; i++ )
{
char* pt = argv[i];
char* end;
if ( pt[0] == '-' && pt[1] == '-' )
pt++;
if ( strcmp( pt, "-all" ) == 0 )
allexts = true;
else if ( strcmp( pt, "-check-outlines" ) == 0 )
check_outlines = true;
else if ( strcmp( pt, "-dir" ) == 0 )
dirs[dcnt++] = argv[++i];
else if ( strcmp( pt, "-error-count" ) == 0 )
{
if ( !rset )
error_fraction = 0.0;
rset = true;
error_count = (unsigned int)strtoul( argv[++i], &end, 10 );
if ( *end != '\0' )
{
fprintf( stderr, "Bad value for error-count: %s\n", argv[i] );
exit( 1 );
}
}
else if ( strcmp( pt, "-error-fraction" ) == 0 )
{
if ( !rset )
error_count = 0;
rset = true;
error_fraction = strtod( argv[++i], &end );
if ( *end != '\0' )
{
fprintf( stderr, "Bad value for error-fraction: %s\n", argv[i] );
exit( 1 );
}
if ( error_fraction < 0.0 || error_fraction > 1.0 )
{
fprintf( stderr, "error-fraction must be in the range [0;1]\n" );
exit( 1 );
}
}
else if ( strcmp( pt, "-ext" ) == 0 )
exts[ecnt++] = argv[++i];
else if ( strcmp( pt, "-help" ) == 0 )
{
usage( stdout, argv[0] );
exit( 0 );
}
else if ( strcmp( pt, "-nohints" ) == 0 )
nohints = true;
else if ( strcmp( pt, "-rasterize" ) == 0 )
rasterize = true;
else if ( strcmp( pt, "-results" ) == 0 )
results_dir = argv[++i];
else if ( strcmp( pt, "-size" ) == 0 )
{
font_size = (FT_F26Dot6)( strtod( argv[++i], &end ) * 64 );
if ( *end != '\0' || font_size < 64 )
{
fprintf( stderr, "Bad value for size: %s\n", argv[i] );
exit( 1 );
}
}
else if ( strcmp( pt, "-test" ) == 0 )
testfile = argv[++i];
else
{
usage( stderr, argv[0] );
exit( 1 );
}
}
if ( allexts )
{
free( exts );
exts = NULL;
}
else if ( ecnt == 0 )
{
free( exts );
exts = default_ext_list;
}
if ( dcnt == 0 )
{
free( dirs );
dirs = default_dir_list;
}
if ( testfile )
ExecuteTest( testfile ); /* This should never return */
time( &now );
srandom( (unsigned int)now );
FindFonts( dirs, exts );
mkdir( results_dir, 0755 );
forever
do_test();
return 0;
}
/* EOF */